Does quantum physics place limits on the extent to which we have free will? This long-debated question stems from the way different physicists interpret the mathematics of quantum theory, but now researchers say they have come up with a way to test the idea and finally settle the matter.

“Everyone has their own opinion on what is going on behind quantum theory. But it shouldn’t matter what we think; the only thing that matters is what we can prove through mathematics and through experiments. And this is what we are…